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Chinese dictionary
v.until; up to
汽车随惯性而下直至滑行停止。
The car coasted along until it stopped.
铅可以在体内积聚直至到达有毒的程度。
Lead can accumulate in the body until toxic levels are reached.
飞机爬升直至飞出了云层。
The plane climbed until it was clear of the clouds.